Shaft and plate assembly and method of assembling the same



Jan. 29, 1957 .1. 1.. EDELEN 2,779,612

SHAFT AND PLATE ASSEMBLY AND METHOD OF ASSEMBLING THE SAME Filed Dec.18, 1950 a IIIIII INVENTOR. JAMES L. EDELEN ATTQRNEY Af li')? ASSEMENLYAND M *THQD on ran SAME lb. Edelen, Kiri-tweed, Mo assignor, by mesneasto industries, incorporated, New York, N V a of New Jersey Thisinvention relates to the assembly of a plate or lever with a rod orshaft and the method of assembling the same.

Welding of an operating lever to a journalled shaft has not beenfeasible, where the lever abuts the shaft bearing as a positioning orend play bearing factor, because of the interference of the flashmaterial formed at the joint. An example of such a shaft and leverassembly occurs in an internal combustion engine carburetor in which thethrottle valve shaft is journalled in the carburetor body and centeredby means of the operating crank which is secured to one end of the shaftand abuts the exposed face of the shaft hearing.

The objects of the present invention are to provide a novel shaft andplate or lever assembly which permits the use of a butt welding methodknown in the art as projection welding and a novel method of effectingsuch assembly.

These objects and other more detailed objects hereafter appearing areattained by the structure illustrated in the accompanying drawing inwhich:

Fig. 1 is a vertical transverse section showing the lower portion of aninternal combustion engine carburetor including a throttle valve, shaft,and operating lever embodying the invention.

Fig. 2 shows in enlarged section the abutting portions of the lever andshaft before uniting.

Fig. 3 is a similar view, but showing the lever and shaft after unitingby electric welding.

4 is a similar view, but showing the united shaft and lever assembledwith the shaft bearing.

Pig. 5 illustrates the interference of the welding flash in theassembly, but without resort to the teaching of the sent invention.

The carburetor in Fig. 1 has a downdraft mixture conduit flanged at thelower end, as at 9, for attachment to the engine intake manifold (notshown). A throttle 19 has end journals rotatable in bearings 11 andformed in the lower or throttle body portion of the carburetor. Anoperating lever or crank 13 is secured to the left-hand end of thethrottle shaft and another arm is secured to the right-hand end of theshaft. T1 osed between crank 13 and the face of journal bear- 12 is afast idle cam 15. Crank 14 and arm 13 and an cooperate with therespective bearing bosses to enter the throttle shaft so that throttleplate 16 operates t carburetor bore.

ing lever 13 is secured to the end of the throttle by the methodillustrated in Figs. 24 inclusive. The lever, initially, is formed witha depression or cavity 13 centrally outset to form a projection 19. Theend of shaft it) is then applied to projection 19, as

States Patent in Fig. 2, and the assembly electrically welded duringwhich process projection 19 is reduced and the molten metal forms theweld, portions thereof being exuded sidewardly, as shown in Fig. 3, toform what is known as the flash in the finished Weld, the end of theshaft 10 rests on a seat flush with the bottom of lever depression 18.

The depression is substantially wider than the thick ness or diameter ofshaft 19 so as to permit such exuding of molten flash metal and also theescape of gases therefrom so that a perfect weld may be obtained. Thedepth of the depression is at least equal to or greater than thecorresponding thickness of the welding flash. This results in the flashclearing the face 21 of the lever which bears against the opposing face22 of cam 15 Without interference from the flash. Figure 5 illustratesthe interference of a welding flash if the novel depres sion wereomitted from the lever.

The invention may be applied to the assembly of any shaft or rod, at itsend, to a lever, arm, or plate and in the accompanying claim the termsshaft or rod refer to any such member corresponding in positioning tothe shaft 10 and the term plate refers to a member such as the lever 13secured to the end thereof. Of course, the cam 15 may be omitted and awasher substituted therefor or the operating lever may directly abut theend of the bearing boss.

The invention may be modified in these and other respects as will occurto those skilled in the art and the exclusive use of all modificationsas come within the scope of the appended claim is contemplated.

I claim:

In combination, a body having an opening therein forming a bearing, ashaft journaled in said bearing, a member fixed on one end of said shaftto prevent its axial movement in one direction, and a member for weldedattachment to the other end of said shaft outwardly of said body, saidsecond member including a plate portion formed with an annular beadoutwardly offset to provide a socket for receiving the end of the shaft,said socket being of greater diameter than the diameter of the adjacentshaft end received therein and having a smaller centrally positionedboss extending inwardly to approximately the plane of the inner surfaceof said plate for engaging the shaft end prior to welding, the outersurface of said boss and the inner face of said socket forming an openannular recess extending laterally beyond the periphery of the shaft,said boss being adapted to be dissipated and flattened during welding tosaid shaft, whereby the inner end of said shaft moves into the socketuntil the inner face of the plate about the socket engages said body tolimit the axial movement of said shaft in the other direction, saidsocket about the end of said shaft forming a depository for exudingflash metal.

References Cited in the file of this patent UNITED STATES PATENTS1,142,241 Ellinger June 8, 1915 1,252,142 Murray Ian. 1, 1918 1,968,976Van Halteren Aug. 7, 1934 2,017,890 Bracke Oct. 22, 1935 2,162,902 AdamsJune 20, 1939 2,272,283 Widgren Feb. 10, 1942 2,319,407 Knochel et al.May 18, 1943 2,447,085 Odlum Aug. 17, 1948

